A pessimist sees only the dark side of the clouds, and mopes; a philosopher sees both sides, and shrugs; an optimist doesn't care. Momentum is wht it wants to gather.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depends upon the unreasonable man.
Believing that soom good can be derived from every event is a better preposition than that everything happens for the best, which is assuredly does not.